Surya Electro Control manufactures High Tension - HT Automatic Voltage Regulator. Surya Electro Control manufactures LT and HT Servo Voltage Stabilizers, Silicon Rectifiers, Control and Panels Distribution Transformers and Transformers with built -in HT - Automatic Voltage Regulator. The High Tension - HT Automatic Voltage Regulator is connected to the HT Line and which filters the fluctuations in the voltage before feeding it to the transformer, thus HT AVR supplies rated Stabilized Voltage to Transformer and hence enable the utilization of the transformer upto its full kVA rating and simultaneously protecting it from High/Low voltage fluctuation.